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説明:

We previously reported that Al13Fe4 consisting of abundant and inexpensive metals, can be hydrogenated to form Al3FeH4 under high pressure and high temperature. However, it remains unclear whether transition-metal-based Al–transition metal alloys can also be hydrogenated. In the present study, Mn-based Mn–Al alloy hydrides were synthesized, and their crystal structures, the composition dependence of hydrogen content, and the hydrogen absorption and desorption properties of the recovered alloy hydrides were investigated. The hcp MnxAl1-x alloy hydrides (x = 0.9, 0.8, 0.7) were formed at 9 GPa and 750°C, and formed hydrides were recovered at ambient conditions. The hydrogen compositions decreased with increasing Al contents, which is attributed to the preferential occupation of Mn6 and Mn5Al1 O-sites in Mn-Al alloys by hydrogen atoms.

権利情報:

• In Copyright
  

キーワード: Metal hydride, High-pressure synthesis, Synchrotron radiation x-ray diffraction, Mn–Al alloy

刊行年月日: 2026-10-02

出版者: Elsevier BV

掲載誌:

• Journal of Alloys and Compounds (ISSN: 09258388) vol. 1082 191509

研究助成金:

• Japan Society for the Promotion of Science 26K17667
• Japan Society for the Promotion of Science 23KJ1856
• Japan Science and Technology Agency JPMJGX23H1

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.8639

公開URL: https://doi.org/10.1016/j.jallcom.2026.191509

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更新時刻: 2026-10-06 11:05:50 +0900

MDRでの公開時刻: 2026-10-06 12:24:12 +0900